package com.example.utils;

import org.springframework.stereotype.Component;

import java.util.UUID;
@Component
public class OrderNumberUtils {
    //生成16位唯一性的订单号
    public String getUUID(){
        //随机生成一位整数
        int random = (int) (Math.random()*9+1);
        String valueOf = String.valueOf(random);
        //生成uuid的hashCode值
        int hashCode = UUID.randomUUID().toString().hashCode();
        //可能为负数
        if(hashCode<0){
            hashCode = -hashCode;
        }
        String value = valueOf + String.format("%015d", hashCode);
        return value;
    }
}
